Slow consumer causes producer to block on UsageManager.waitForSpace indefinately
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                 Key: AMQ-1136
                 URL: https://issues.apache.org/activemq/browse/AMQ-1136
             Project: ActiveMQ
          Issue Type: Bug
    Affects Versions: 4.2.0
            Reporter: Albert Strasheim


The issue is described in this thread:

http://www.nabble.com/Blocking-on-UsageManager.waitForSpace-again-tf3031460.html

Basically, a slow consumer can cause a producer to block on 
UsageManager.waitForSpace indefinately.

A basic code sample to reproduce the problem is provided here:

http://www.nabble.com/Re%3A-Blocking-on-UsageManager.waitForSpace-again-p8521205.html

Note that the reproducibility of the bug depends on the initial and maximum 
size of the VM's heap.

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